package simultaneously.base;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * Created by 焕滨 on 2016/3/12.
 */
public class SimplePriorities implements Runnable {
    private int countDown = 5;
    private volatile double d;
    private int priority;
    public SimplePriorities(int priority){
        this.priority = priority;
    }

    public String toString(){
        return Thread.currentThread() + ":" + countDown;
    }
    public void run() {
        Thread.currentThread().setPriority(priority);
        while(true){
            for(int i = 0;i<100000;i++){
                d += (Math.PI + Math.E)/(double) i;
                if(i % 1000 == 0)
                    Thread.yield();
            }
            System.out.println(this);
            if(--countDown == 0) return;
        }
    }

    public static void main(String[] args){
        ExecutorService exec = Executors.newCachedThreadPool();
        for(int i=0;i<5;i++){
            exec.execute(new SimplePriorities(Thread.MIN_PRIORITY));
        }
        exec.execute(new SimplePriorities(Thread.MAX_PRIORITY));
        exec.shutdown();
    }
}
